A special synthetic gear oil for CVT (Continuously Variable Transmission) – variable-speed gears. It was specially developed for use in continuously variable transmissions with a rigid articulated chain or a steel pull chain. It ensures a flawless operation of an automatic gearbox, guarantees minimal wear, a lasting service life of a transmission and fuel economy. The oil is a service product that requires a professional approach to selection. Its selection depends on the type of a variable-speed gear instead of the make of a vehicle. The oil has been tried and proved to be effective especially in Autotronic Mercedes-Benz Class A and B gearboxes, and in continuously variable automatic transmissions (Multitronic) in Audi vehicles.